[llvm] [BOLT] Add pre-parsed perf script support (PR #163785)

[Ádám Kallai via llvm-commits]

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@@ -415,6 +415,106 @@ void DataAggregator::parsePreAggregated() {
   }
 }
 
+std::error_code DataAggregator::parsePerfTextFileHeader() {
+  size_t LineEnd = ParsingBuf.find_first_of("\n");
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kaadam wrote:

Updated.

https://github.com/llvm/llvm-project/pull/163785